Aragonite saturation state dynamics in a coastal upwelling zone
TLDR
In this paper, an upwelling of high CO2 water and subsequent removal of CO2 by phytoplankton imparts a dynamic range to ΩAr from ~1.0 to ~4.0 between spring and autumn.Abstract:
[1] Coastal upwelling zones may be at enhanced risk from ocean acidification as upwelling brings low aragonite saturation state (ΩAr) waters to the surface that are further suppressed by anthropogenic CO2. ΩAr was calculated with pH, pCO2, and salinity-derived alkalinity time series data from autonomous pH and pCO2 instruments moored on the Oregon shelf and shelf break during different seasons from 2007 to 2011. Surface ΩAr values ranged between 0.66 ± 0.04 and 3.9 ± 0.04 compared to an estimated pre-industrial range of 1.0 ± 0.1 to 4.7 ± 0.1. Upwelling of high-CO2 water and subsequent removal of CO2 by phytoplankton imparts a dynamic range to ΩAr from ~1.0 to ~4.0 between spring and autumn. Freshwater input also suppresses saturation states during the spring. Winter ΩAr is less variable than during other seasons and is controlled primarily by mixing of the water column.read more
Citations
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A multi-decade record of high-quality fCO2 data in version 3 of the Surface Ocean CO2 Atlas (SOCAT)
Dorothee C. E. Bakker,Benjamin Pfeil,Benjamin Pfeil,Camilla S. Landa,Camilla S. Landa,Nicolas Metzl,K. O'Brien,Are Olsen,Are Olsen,K. Smith,Catherine E Cosca,S. Harasawa,Stephen D. Jones,Stephen D. Jones,Shin-Ichiro Nakaoka,Yukihiro Nojiri,Ute Schuster,Tobias Steinhoff,Colm Sweeney,Colm Sweeney,Taro Takahashi,Bronte Tilbrook,Bronte Tilbrook,Chisato Wada,Rik Wanninkhof,Simone R. Alin,Carlos F. Balestrini,Leticia Barbero,Leticia Barbero,Nicholas R. Bates,Alejandro A. Bianchi,Frédéric Bonou,Jacqueline Boutin,Yann Bozec,Eugene Burger,Wei-Jun Cai,R. D. Castle,Liqi Chen,Melissa Chierici,Kim I. Currie,Wiley Evans,Charles Featherstone,Richard A. Feely,Agneta Fransson,Catherine Goyet,Naomi Greenwood,Luke Gregor,S. Hankin,Nick J. Hardman-Mountford,Jérôme Harlay,Judith Hauck,Mario Hoppema,Matthew P. Humphreys,Christopher W. Hunt,Betty Huss,J. Severino P. Ibánhez,J. Severino P. Ibánhez,Truls Johannessen,Truls Johannessen,Ralph F. Keeling,Vassilis Kitidis,Arne Körtzinger,Alex Kozyr,Evangelia Krasakopoulou,Akira Kuwata,Peter Landschützer,Siv K. Lauvset,Nathalie Lefèvre,Claire Lo Monaco,Ansley Manke,Jeremy T. Mathis,Liliane Merlivat,Frank J. Millero,Pedro M. S. Monteiro,David R. Munro,Akihiko Murata,Timothy Newberger,Timothy Newberger,Abdirahman M Omar,Tsuneo Ono,K. Paterson,David A. Pearce,Denis Pierrot,Denis Pierrot,Lisa L. Robbins,S. Saito,Joe Salisbury,Reiner Schlitzer,Bernd Schneider,Roland Schweitzer,Rainer Sieger,Ingunn Skjelvan,Kevin F. Sullivan,Kevin F. Sullivan,Stewart C Sutherland,Adrienne J. Sutton,Kazuaki Tadokoro,Maciej Telszewski,Matthias Tuma,Steven van Heuven,Doug Vandemark,Brian Ward,Andrew J. Watson,Suqing Xu +103 more
TL;DR: This ESSD "living data" publication documents the methods and data sets used for the assembly of this new version of the SOCAT data collection and compares these with those used for earlier versions of the data collection.
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